AI Person Swap
AI person swap for video — replace the person in any video with a new person from a single reference photo. Motion, framing, and audio of the source video are preserved.
📄 About AI Person Swap
AI Person Swap is JAI Portal's purpose-built tool for replacing the person in any video with someone else, using only a single reference photo. Whether you're building a music video with a different lead, swapping a stand-in for a final talent, generating localized ad variants for different regions, or producing fan-edit content, AI person swap removes the entire shoot, casting, and re-record pipeline. Upload the source clip, upload the new person's photo, and the model regenerates the video with the new identity performing the exact same motion as the original.
Under the hood, AI Person Swap is powered by Kling Video v3 Motion Control's pro-grade motion synthesis engine. Instead of doing a flat face overlay like older face-swap tools, the model rebuilds the person frame-by-frame from your reference photo while locking onto the body pose, camera motion, and timing of the source video. The result is full-body identity replacement, not a sticker on a face. Hair, clothing silhouette, posture, and orientation transfer naturally, and the original audio track is preserved by default so dialogue, music, or ambient sound stay in sync.
AI Person Swap is ideal for creators who want to swap person in video without dealing with rotoscoping, masking, or after-effects keyframes. Marketers can spin up multiple ad creatives by changing only the talent photo. Educators can re-cast tutorial videos with a different presenter. Social-media editors can generate response, reaction, or remix content with a new identity. Indie filmmakers can pre-visualize casting choices before booking actors. Because the engine is the same one trusted for professional dance and gesture transfer, the output reads as natural human motion, not stiff puppet animation.
Two orientation modes give you control over how the swap respects the source video's geometry. 'Video Match' (up to 30s) prioritizes the source camera path, body rotation, and motion arcs — the new person inherits the full directorial framing of the original clip. 'Image Match' (up to 10s) keeps the new person's orientation grounded in their reference photo, useful when the source video has aggressive camera moves you want softened. Both modes accept an optional text prompt to influence lighting, outfit, or environmental cues without breaking motion fidelity.
AI Person Swap runs entirely on JAI Portal — no signup walls, no model downloads, no GPU rentals. The pay-as-you-go credit system means a single 5-second swap costs cents, and there's no subscription required to test it. Commercial-use rights are included on every paid generation, so the output is ready for client deliverables, paid advertising, music videos, or any revenue-generating project the moment it finishes rendering. If you've been searching for a way to ai video replace person without learning DaVinci, After Effects, or paying a VFX studio, this is it.
💡 Use Cases
⚡Swap the lead in a music video, dance reel, or short-form social clip without a reshoot.
⚡Generate localized advertising variants with different talent for different regions or markets.
⚡Re-cast tutorial, presenter, or explainer videos with a new on-camera identity.
⚡Pre-visualize casting choices for filmmakers, ad agencies, or content studios before booking actors.
⚡Create response, reaction, or remix content for TikTok, Instagram, and YouTube with a new identity.
⚡Build personalized video gifts by inserting a friend, family member, or yourself into an existing clip.
⚡Produce branded UGC-style ads at scale by swapping a single reference photo per creative variant.
🎯 Best For
🎯
Marketers, editors, music-video creators, ad studios, and indie filmmakers who need to replace a person in a video without a reshoot, rotoscoping, or VFX pipeline.
👍 Pros
✓Full-body identity swap, not a flat face overlay — body, hair, and silhouette transfer naturally.
✓Original audio track is preserved by default, so dialogue and music stay in sync.
✓Only needs one reference photo of the new person — no training, no LoRA, no dataset.
✓Two orientation modes adapt to either complex motion or aggressive camera moves.
✓Cents per swap on pay-as-you-go credits — no subscription required.
✓Commercial-use rights included on every paid generation.
⚠️ Considerations
△Reference photo must show a clear face and body — sunglasses, heavy occlusion, or tiny faces hurt fidelity.
△Source clips longer than 30 seconds need to be split before swapping.
△Scenes with multiple people may not isolate the intended subject cleanly — single-person shots work best.
△Extreme camera shake, rapid cuts, or motion blur can reduce swap quality.
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Frequently Asked Questions
Face swap tools paste a face onto an existing body — the body, hair, and silhouette of the original person stay in the video. AI Person Swap rebuilds the person from your reference photo and re-renders them performing the source motion, so hair, body shape, posture, and outfit silhouette all match the new identity instead of the original.
It works on most single-person clips up to 30 seconds with stable framing. The source video should show the subject clearly — extreme camera shake, rapid cuts, multiple overlapping people, or heavy motion blur will reduce swap quality. For longer videos, split them into ≤30s segments and run each separately.
Yes by default. 'Keep original sound' is ON, so dialogue, music, and ambient sound from the source video are preserved on the swapped output. Disable it only if you plan to add custom audio in post-production or replace the soundtrack.
Reference photo: a single high-quality image showing the new person — full or upper body, clear face, good lighting. Source video: under 30s for 'Video Match' mode, under 10s for 'Image Match' mode. For longer source footage, split into segments before swapping.
Yes. All paid generations on JAI Portal come with full commercial-use rights, including AI Person Swap outputs. Make sure your source video and reference photo are either original creations or properly licensed — JAI Portal grants commercial rights on its output, not on third-party content you upload.
Output quality sits between traditional face-swap tools and a real re-shoot. Because the model rebuilds the full body from the reference photo (rather than overlaying a face on the source body), the result reads as a fresh take with a new performer, not a sticker on top of the old performer. Quality is best when the reference photo is high resolution, the source clip is stable, and the framing of both matches. Heavy compression, multiple people in frame, or extreme camera motion can reveal AI artifacts — for those edge cases, plan to do a light cleanup pass in your editor.
AI Person Swap is built for single-person clips. If your source has multiple people, the model will target one subject (usually the most prominent) and may blend identities on secondary people. For multi-person scenes, isolate each person into a separate clip first (using masking in your editor), swap each separately, then composite the swaps back together. A simpler alternative for face-only changes is
AI Video Body Swap or
Video Head Swap, which are tuned for different swap scenarios.
AI Person Swap uses duration-based pricing — a 5-second swap costs roughly a fifth of a 25-second swap. Exact credit cost is displayed before you submit each generation, so you can dial duration up or down to match your budget. The 'Image Match' mode (up to 10s) is cheaper than 'Video Match' (up to 30s) since it processes a shorter clip. Pay-as-you-go means no subscription — top up once, run as many swaps as you need.
Output is MP4, H.264 encoded, optimized for web and social platforms. Aspect ratio matches the source video (16:9, 9:16, 1:1, or 4:5) so vertical TikTok/Reels clips stay vertical and horizontal YouTube clips stay horizontal. Resolution typically matches the source video; for sub-1080p sources, the output may not be sharper than the input. Frame rate matches the source (24 or 30 fps in most cases). If you need 4K outputs, upscale the result with
Topaz Video Upscaler after the swap completes.
Yes — every paid generation on JAI Portal grants full commercial-use rights, including for ads, branded content, music videos, and client deliverables. The catch is that JAI Portal grants rights on the AI output, not on third-party content you upload. If your reference photo or source video belongs to someone else, you need their permission (or a license) before using the swap commercially. For consent-required scenarios (using a real person's likeness), always get written permission — AI cannot replace legal release forms.
If results drift, work the inputs first before re-rolling. (1) Try a higher-quality, better-lit reference photo with the face clearly visible. (2) Trim the source video to a single continuous shot — cuts and rapid scene changes are the #1 source of identity drift. (3) Switch orientation modes — sometimes 'Image Match' produces cleaner results than 'Video Match' for camera-heavy footage, and vice versa. (4) Add a short prompt nudging lighting or outfit to match the source. If you've tried all four and still aren't happy, swap to a tighter framing on both inputs (head-and-shoulders only) — the model has fewer degrees of freedom to drift on. For final cleanup, run the result through your editor to color-match against any unaffected clips around it.
⚖️ How AI Person Swap Compares
AI Person Swap is JAI Portal's flagship tool when you need to ai video replace person — the full identity (face, hair, body, silhouette) is rebuilt from one reference photo while the source video's motion, framing, and audio are preserved. Compared to
AI Video Body Swap, which is tuned for keeping a face and changing the body underneath, Person Swap goes the other direction — change the whole person, keep the performance. Against
Video Head Swap, which only replaces the head/face region, Person Swap is the right call when you want the entire silhouette to match the new identity (different hair length, different build, different outfit). For traditional face-overlay workflows where you want maximum face fidelity but the original body to stay intact, the head/face tools remain the right choice. If your project is a single still image rather than a video, use
AI Image Body Swap or
AI Image Head Swap instead. Pick AI Person Swap when you need to swap person in video at the level of a re-shoot — different lead, same scene — without the cost, time, or coordination of an actual re-shoot. Start with a
free account, test a 5-second clip, then scale up to longer durations once you've dialed in the reference photo and framing.